hey guys im thinkin about putting twins on my pickup and was wandering if there was a kit or something i want to keep my hx35 and just get a s300 with it i dont know much about twins i know would need head studs and im not lookin for anything xtreme just for towing and daily driving any info appreciate it thanks for readin

 

A few companies make kits that utilize your factory top turbo. I am currently fabbing up a setup that will use a S400 and my HX35. I have a hotpipe that will bolt to the S400, but has a S300 flange on it. Fortunately I have found an adapter to connect HX35 to HX40 flange. I have been reassured S300 s and HX40s have the same flange. It's tough to get just the hotpipe from companies, they know what your up to and don't want to loose a sale.

 

is the s400 better or should i just look for a s300?

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i just found this kit PDR Diesel Performance: Cobra Stage 1 Twin Turbo Kit (HX35/HT3B) 1998-2002 Dodge Cummins

 

The kits look great, I do agree. I just can't bring myself to spend that kind of cash on something I can make myself for much, much less. Especially as I acquired my S400 for $0.
I have heard opinions that a S400 is "lazy" for a set of compound turbos. Yet I have ridden in 3 trucks using S400s, 1 that still uses the factory HX35 as the top turbo, and they pull HARD.

 

ya no kiddin have u heard much about those ht3b turbos the kit im lookin at uses ur hx35 on top and the ht3b on bottom

 

If you are going to run an s300, you want an s366. And in all honesty, you will save money by running a larger primary. The s400 and ht3b are both very good options for a set of all around street/towing twins on a budget. Both turbos are readily available, and are usually quite a bit cheaper than the modified s300 variants out there. Parts and kits are also readily available as well. The s400 would probably spool a bit faster than the ht3b, but both are decent chargers.

Sending you a PM to go along with this post as well.
Sean